Protective Put
Insurance for your stock position — limit your downside while keeping unlimited upside potential. Buy a put against shares you already own to set a guaranteed exit floor.
A protective put is used by investors who are bullish on a stock but want to limit their downside risk. If you own 100 shares and are nervous about a potential drop, you buy one put option at a strike price (Strike A) below the current price. If the stock falls below Strike A, you have the right to sell your shares at that guaranteed price — no matter how far the stock drops.
Structure:
- Own 100 shares of an underlying stock
- Buy 1 put option at Strike A (below current price)
Think of it like car insurance — you pay a premium upfront, and if something bad happens, you're covered. If nothing bad happens, the premium was the cost of your peace of mind.
| Feature | Protective Put | Stop-Limit Order | Market Stop-Loss |
|---|---|---|---|
| Cost | Put premium paid | Free | Free |
| Guaranteed Exit Price | ✓ Yes — at Strike A | ✗ May not execute | ✗ Slippage possible |
| Gap Down Protection | ✓ Fully protected | ✗ May skip entirely | ✗ Executes far below |
| Upside Potential | Unlimited (minus premium) | Unlimited | Unlimited |
| Whipsaw Risk | Not affected — you choose when to exercise | Can trigger on intraday dip | Can trigger on intraday dip |
- Guaranteed floor — sell at Strike A regardless of how far stock drops
- Gap down protection — protected even if stock gaps overnight
- No whipsaw risk — you choose when to exercise
- Unlimited upside — still benefit fully if stock rises (minus premium)
- Peace of mind — hold through volatility without panic selling
- Premium cost — reduces profit if stock goes up or stays flat
- Time decay (theta) — put loses value every day
- Ongoing cost — must keep buying new puts as they expire
- Higher IV = higher cost — expensive during volatile events
Ideal Situations:
- Bullish but nervous — believe in the stock long-term but fear short-term pullback
- Protecting gains — stock has run up significantly
- Into earnings — protecting a position through a binary event
- Concentrated position — large position in a single stock
- Market uncertainty — risky conditions but don't want to sell shares
Avoid When:
- Implied volatility is very high — puts will be expensive
- You plan to hold for only a very short time
- Stock is already showing weakness — may be better to sell
Buy: 1 XYZ $95 Put (Strike A) @ $2.00 → Cost: $200 | Expiration: 45 days out
📈 Stock rises to $120
- Put expires worthless
- Stock gain: +$2,000
- Premium lost: −$200
- Net Profit: +$1,800
➡️ Stock stays at $100
- Put expires worthless
- Stock gain: $0
- Premium lost: −$200
- Net Loss: −$200
📉 Stock crashes to $60
- Exercise put, sell at $95
- Stock loss limited to: −$500
- Premium cost: −$200
- Max Loss: −$700 (vs −$4,000!)
Key Metrics:
Max Loss: ($100 − $95) + $2 = $7/share ($700) | Breakeven: $100 + $2 = $102
| Strike Level | Example (Stock @ $100) | Cost | Protection |
|---|---|---|---|
| At-the-Money (ATM) | $100 Put | Most expensive | Maximum protection |
| Slightly OTM | $95 Put | Moderate | Good — small deductible (most common) |
| Deep OTM | $85 Put | Cheapest | Catastrophic protection only |
Think of strike selection like choosing an insurance deductible — a higher deductible (deeper OTM) costs less but leaves you exposed to more loss before coverage kicks in.